Q. ilicifòlia.
15. Quércus ilicifòlia, Wang. (Bear or Black Scrub-oak.) Leaves obovate, wedge-shaped at base, angularly about 5-lobed (3 to 7), white-downy beneath, 2 to 4 in. long, thickish, with short, triangular bristle-tipped lobes. Acorn ovoid, globular, ½ in. long. A dwarfed, straggling bush, 3 to 10 ft. high. Sandy barrens and rocky hills. New England to Ohio, and south.
Q. aquática.
16. Quércus aquática, Walt. (Water-oak.) Leaves thick, sub-evergreen, obovate-wedge-shaped, smooth, tapering at the base, sometimes obscurely 3-lobed at the tip; on the seedlings and the young rapid-growing shoots often incised or sinuate-pinnatifid, and then bristle-pointed. Acorn small, globular-ovoid, downy, in a saucer-shaped cup, very bitter; in the axils of leaf-scars of the previous year. A very variable tree, 30 to 40 ft. high, with smooth bark. Wet ground. Maryland, west and south.
Q. nìgra.
17. Quércus nìgra, L. (Black Oak or Barren Oak.) Leaves large, 5 to 10 in. long, thick, wedge-shaped, broadly dilated above, and truncate or slightly 3-lobed at the end, bristle-awned, smooth above, rusty-downy beneath. Acorn oblong-ovate, ½ to ¾ in. long, in the axils of the leaves of the preceding year, one third or one half inclosed in the top-shaped, coarse-scaled cup. A small tree, 10 to 25 ft. high, with rough, very dark-colored bark. New York, south and west, in dry, sandy barrens.
Q. imbricària.